Help With Applying PV=Constant Equation

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    Thermodynamics
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Homework Help Overview

The discussion revolves around the application of the equation PV=constant in the context of thermodynamic processes, specifically focusing on isobaric processes and their implications for volume and temperature relationships.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants explore the validity of the PV=constant equation and its applicability to different processes. Questions arise regarding the specific conditions under which the equation is valid and how it relates to the ideal gas law. There is also a discussion about deriving relationships between volume and temperature in isobaric conditions.

Discussion Status

The discussion is active, with participants providing insights into the nature of the process in question and suggesting steps to approach the problem. There is an exploration of different scenarios involving mass and pressure, indicating a productive direction in understanding the concepts involved.

Contextual Notes

Participants note the urgency of the situation, as one member mentions having an exam the following day, which may influence the depth of discussion and the types of questions raised.

Arun Raja
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Homework Statement


http://puu.sh/c0rhe/fb6b48f890.png

Homework Equations


PV=constant

The Attempt at a Solution



I have no idea how to apply the above equation. Please help.[/B]
 
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The above equation (PV=const) can not be applied. For what process is it valid? What process is the problem about?

ehild
 
It is a isobaric process.
 
Remember the ideal gas law. What equation holds between V and T in an isobaric process?
 
V/T=k

but how is this supposed help me answer the question?
Pls provide some help.
I am having my exams tmrw
 
Perhaps you could do it in a couple of steps?

The graph B shows the V-T plot for a mass m at a constant pressure P. What would be the V-T plot for one quarter of that mass, m/4, at the same constant pressure P?

Finally, what would now be the plot for m/4 at half the pressure, viz., P/2?
 

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